automatic bag pilling hachihe



1.. H.- HARTMAN Au'ron'rmnm FILLING MACHINE 2 Sheets-Sheet 1 Sept 30.1930,

Orlginal Filed April 29, 1927 Jmwritot L. H. HARTMAN Sept. 30, 1930. AUTOIATIC am FILLING mourns 2 Sheets-Sheet 2 0r1g1na1 Filed April 29, 192'! V Ill/l2 J \\\\M\ Jmxmkw man ummy the upper part of the machine. Fig. 2 is a Reieeued Sept. 30, 1930 Re. 1 7,s 6

UNITED v sfra'rss PATENT OFFICE,

LOUIS 1:. Emma, or TOLEDO, onro, ASSIGNOB, BY MESNE assrenmnm's, r0 ra'rns vrmvn nae conrona'rron, or new YORK, 1:. Y., A conromrron or NEW mnsnr v AUTOMATIC BAG-FILLING MACHINE I Original :0. 1,667,858, dated 1 My invention has forv its object to provide a dispensin machine having an automatic weight regu ative cut-off for subdividing the material into portions of desired weight. My invention is an improvement particularly in bag fillingmachines that are automatically controlled by the weight of the material that is delivered to suitable receptacles. The invention provides means whereby the number trate a particular application of my inve'ntion, I have selected one of such machines as an example and shall describe it hereinafter. The machine selected is illustrated i the accompanying drawings.

Fig. 1 illustrates a front broken view of view of a section taken on the plane of the line 2-2 indicated in Fig. 1. Fig. 3 illustrates a view of a section similar to that weight 3 which is suitably and adjustably supported on the other end of the scale beam. The scale beam has a suitable fulcrum 4 and stops 5' for limiting the movements of the scale beam on the fulcrum 3., The frame is susceptible to slight vertical movements and is held in an upright position by means of a horizontally extended rod 6 that is pivotully connected at one end to the machine by means of the in 7 and to a stirrup '8 at the other end. T e stirru 8 has a knife edge 9 that engages in a soc et formed in a cross member 10 of hardened material located in the upper end of the frame 1. Lateral movement of the bar, 10 away from" the knife edge ay 1, 1928, Serial in. 187,660, filed ApriI 29,- 1927. Application for filed October 15, 1928. Serial No. 312,718.

reissue 9 is prevented by the relative location of parts of the machine as hereinafter described.

A nozzle or spout, hereinafter referred to as a filler tube 15, is connected to the frame 1. The tube 15 may be located in a sleeve or its wall maybe provided with a tapering end portion 16.- Fingers 17 that extend from the Y mner end of the tube, aiemonhec'ted to a sloping shelf or plate 181 that is formed integral with the frame 1. 'The filler tube is thus connected to the frame 1. The filler tube '15 has a substantially elliptical opening 20 located-on its under side, the edge-of the opening 20 being located in a plane .that extends at a slight angle to the axis of the filler tube 15. The outer end of the filler tube is rovided with a sloping surface 21 that is. inclined downward. The inclined surface 21 ma be formed by increased thickness of the en of the filler tube as at 22, or by securing the downwardly inclined surface 21 or the end of the tube may be bent downward. The surface 21 operates to direct the material, that is discharged through the filler tube, at an angle downwards into a suitable receptacle, such as, a bag that may be located below the fillloer tube or partially supported on the filler tu e.

The frame 1 may be provided with a suitable platform 25. Preferably the platform 25 is adjustably connected to the sides of the frame 1 so that it may be adjusted according to the height of the receptacle, or the length of the bag, with reference to the filler tube 15; If desired, a shield 26 may be connected to Ill ' a small block of metal in the end to form the sides of the frame 1 and located around three sides of the platform 25 for retaining the receptacle in position. In the particular form of construction shown, the machine is designed for filling bags with finely divided material such as cement, plaster, etc., the bags used having openings in the upper corners, the upper ends of the bags being so constructed that they may be readily slipped over the filler tube 15. The platform 25 is so positioned as to support the major portion of the weight of the material inserted into the bag while the tube 15 holds the top up and'in position that the bag maybe filled.

In dispensing finely divided material of the character described, it is necessary to pro- .vide a mechanism for feeding the material to the outlet and. at the same time also hold 5 back the material from the bins which, by reason of its enormous weight, subjects the material at its outlet to enormous pressure. In the form of construction sho'wn, a rotating valve or feeder is supported in the u shell 31 which regulates thesupply of the material tothe casing 32. The casing 32 1s weight of the lever 44 to bpe'rate the blade 1 43 to produce a quick closure of the orifice provided with an'ejector 33 having the blades .34 that move the material towards theoutlet or orifice 35. Theejector 33 is, however, so constructed that it will operate to feed the material into the orifice'35. The casing 32 has a surface 36. that is eccentric to the center of rotation of the ejector 33 and coacts with the blades '34 of the ejector 33 to work the material into the orifice 35. The axis of the orifice is substantially tangential to the circle described by the centers of the blades 34 and so that the blades 34, where they come in close proximity to the surface 36, operate orifice 35. V v

The orifice 35 is formed within a neck that is integral with a plate 41 which is secured to the casin 32. A shallow recess 42 is formed within th point be w the lower'side of the orifice, as

shown in Fig. 2, and a shutter in the form 35jiand the enlarged shank of the blade 43 is somade as to withstand this impact. However, in the closing movement of; the blade. 70

the resistance of the finely divided material, somewhat compacted by the feeder 33 tends to'retard'the movement of the blade produced by the weight of the lever 44 and the springs 50. Where the finely divided material con- 75 tains a fibrous ingredient, the resistance to the movement of the blade through the material is somewhat greater and since the blade should quite entirely close the orifice to We vent the movement of the material beneath so the edge of the blade, it is necessary that the bladeshould be subjected to a considerable downward pressure when it is closed. This is accomplished b the springs 5() and the momentum of the ever 44. The sharpened edge 5 permits penetration of the finely. divided material and permits the insertion of' the to force the material through the e casing 32 which extends from a 'oint well above the-orifice 35 to a.

to a lever 44 by means of a pin 45 that ex-' tends through a sleeve 46 that may be formed integral with the blade 43. The lever 44 is 40 ivotally mounted on the pin 47. extending tween flanges 48 that are formed integral I with the shell 31. A pad 97 is provided on the casing in position to be contacted by 8. lug 98 on lever 44 and limit the movement I of the lever before the end of the blade quite reaches the bottom of recess 42; but as the bottom of the recess is .frequently'filled with the material being fed, the end of the blade encountersthis material, and consequently,

j the momentum'of the lever 44 is frequently sustained by the blade u on the completion of its closing stroke in clhsing theorifice 35. In order to withstand this impact the blade 43 is made thicker at the point of the juncture between the blade 43 and the sleeve 46,

as at 49. The lateral surfaces of the blade 43 flare at this point toproduce curved surlever:44 may also be proi 32. The tension springs-50 coact with the the casing 32', and only to the lower edge of 1:15 the orifice .movement'in closing theorifice 35 vent escape of the material beneath the end 95 blade 43 to a point substantially at the lower side of the orifice 35. The vsharpenededge is of particular value where a fibrous in-. 90. gredient is. contained inthe finely divided 1.

material that is dispensed by the machineand enables the blade 43 to make its complete and preof the plate by the compacting action of the ei cton- I 4 As indicated in the drawin the orifice is rounded in cross section, while the end of the blade is comparatively square. .As a; 1

result, when the blade asses-downward the sharpened front side of the blade shearsofl the material against the face of plate 40, be ginning at the corners of the blade as soon as the middle of the blade passes the middle of the orifice and continuing towards. the center of the blade as it moves downward.

The upper end of the blade 43 moves within a recess that is formed between the the blade 43 from of the subdivided 43 does not pass through the lower .sideof drawing out with it any 35, escape of the. material from the machmeexcept. through the orifice 35- and 'into ,the receptacle is'entirely eliminated surfaces of the I 43. Also, toin'sure quick closing of The within the recess. N

The orifice 35 is madevery short so "as to locate the filler tube 15 very closeto the blade 43 and to the ejector 33. A short flexible'tube mterconnectsthe ends of the neck 40 and the filler tube 15. The ends of the flexible,

tube are-connected to, these parts by suitable clamping collars61 and 62., Theflexible tube/ 60 is thus located in close proximity to the blade43 and,conseqnently, is subjected to the i ate 41 and the casing 32. Packing-mate-- 10 I rlal 56 is located in the recess 55 to prevent material. Sincethe blade 5 recess. 55 is closed by means of a" plate 57wh1ch operates to retain :the packing 56 -120 compaction produced by the ejector 33 which, however, is normally uniform while the material is being fed into the receptacle. The ends of the neck 40 and of the filler tube '15 being located in close though spaced relation, are spanned by the very short tube 60, and the vertical movement of the filler tube 15 and of the frame 1, relative to the neck 40, is necessarily very short. It is during this slight vertical movement of the filler tube 15, relative to the neck 40, that the lever 44 is tripped to close the orifice 35. In order to prevent the movement of the blade 43 from affecting the responsiveness of the machine through a variation of the condition of the flexible tube by further compaction of the material in the neck 40, the lower edge 64 of the blade is beveled as well as sharpened. The beveled side is located on the side that the ejector 33 is located on, and thus forces all material inits path back into the casing and does not afi'ect the compaction of the material in the short flexible tube 60.

In order to trip the lever 44, a second lever is pivotally supported on a pin'7l that extends between fianges 72 that protrude from the wall of the shell 31, or from a bracket that is secured to the wall of the shell. The lever 70 is Weighted so'that'one end will drop towards the lever -44. A member 73 is pivoted on the lever 44 and is stopped in its movement in one direction by a shoulder 74 formed on the lever 44 and in its movementin the other direction by an adjustable in 7 5 that is secured to the member 73. T e end of the pin 75 is adapted to engage the edge of the lever i 44. The effective length of the member 73 may be adjusted b a threaded pin 76 located in the upper en of the member. When, therefore, the lever 44 drops down by the operation of its own weight and the spring 50, the member 73 by reason of the relation of its center of grat'ity to its pivot pin 7 7, falls forward to a point between the levers 44 and 70.

.iVhen the lever '71) drops down it engages the corners 78 of the flanges 72 that v protrude from the wall of the shell 31. This gives ample opportunity for the member 73 to locate itself between the levers 44 and 70. \Vheu the lever 44 is raised, the head oi? the pin 76 engages the lever 70 to also raise the lever 7 O. The lever 44 is provided with an arm 79 while the lever 70 is provided with a dog 80 which is pivoted on the pin 71 that also pivotally supports the lever 70. The arm'7 9 of the lever 44 and the dog 80 are provided with engaging plates 81 and 82 of hardened metal that inter-engage to maintain the lever 44 in its raised position.

- The dog 80 protrudes beyond the edge of its plate 81 and so that while the dog may be slightly raised with respect to the-lever 70 as the arm 79 moves under the edge of the dog,

yet when the arm passes beyondthe plate 81 the dog 80 will drop so as to position the edges of the plates 81 and82 in engaging relation. The dog .80 allows for the difference in direction of movement between the arm 7 9 about the pivot pin 47 and the movement of the lever 70 about the pivot .71. Downward movement of the dog 80 is limited by a pair of lugs 83 that engage the end of the lever 70.

When the lever 70 has been raised to a position such that the lever 44 will be en gaged by the dog 80, the lever'70 will be held in this position by means of a pivoted arm 90.-

The arm is spring pressed by means of the spring 91 against a suitablestirrup 92 that extends around the outside of the arm 90. The arm 90 is pivoted on a pin 93 that extends through a pair of lugs 94 on the outer end of the lever 7O. A pin 95 is located in the frame 1 and so as to be engaged by the end of the arm 90. When the lever 70 is raised, the lower end of the arm 90 will be stayed inits lateral movement b the end of the pin 95 until the lower end 0 the arm 90 passes above the pin 95. This stay in the lateral movement will be yieldingly resisted by the elasticity of the spring 91 and the arm 90 will thus be slightly snapped into engagement with the pin 95. The adjustments are such that engagement with the pin 95 will occur at the same time that the lates 81 and 82 interengage and so that the ever 44 will be held in its raised position by the lever 70. A slight return movement of the lever 70 toplace the plates 81 and 82 into contact releases the member 73 from its intereligaging relation as between the levers 44 and 70 and, consequently, the member 73 will, by

reason of the change of the position of its lever 70 will drop-down until it is engaged,

by the shoulders 78. This will release the lever 44 which acting under the force of its own weight, and the springs 50, will cause the blade 43 to close the orifice 35. This will occur when the weight of the material which is directed intothe receptacle, such as a bag placed upon the platform 25, has reached the predetermined amount as determined by the location of the weight 3 on the scale beam 2, and the further movement through the orifice 35 and the filler tube 15 will cease. The filled bag may then be withdrawn from the filler tube 15 and from the scales and a new bag may be placed on the filler tube. The lever 44 may then be raised by lifting on the handle 96 which will cause the member 73,

which has' dropped into engaging relation with respect to the lever 7 0, to raise the lever 70 until the end of the arm 90 engages with the pin' 95, while at the same time the member 73 will drop against the sto 7 4 and thearm 79 will be engaged by the g 80. This movement of the lever 44 will draw the blade 43 along its recesses and through the packf spect to the levers 44 and- 70 to raise the er than the other edges'of thefblade.

ing material 56 which opens the orifice 35 and the material continues to move through the filler tube 15. This continues until theframe 1 is again moved downward by the weight of the material in the bag which causes the levers 44 and to"drop and the member 7 3 to fall into its engaging relation with reslot could be formed in an integral construction of casing and discharge member, if desired, and other changes may be made within the scope of the appended claims while still retaining the substance of the invention.

What I claim is: a

1. In a dis 'ensing machine, a filler tube for directing t e material dispensed into a receptacle, a machine casing having an orifice communicating with the tube, an ejector located in the casingfor forcing the material through the orifice and the tube, a frame for supportingthe receptacle and the filler tube, a scale for supporting the frame, a flexible tube interconnecting the casing and thefiller tube, and a cut-off blade movable in the casing, the lower endof-the cut-off blade extending to near the lower end of the orifice when the orifice is closed b the blade;

2. In a dispensing .mac ine, a weighing scale for supporting a rece tacle, a filler tube for receiving the upper en of the receptacle, a machine casing a flexible tube interconnecting. a filler'tube and the casing for conducting material from the casing to the filler tube, an ejector for forcin material from the casing through the flexi le tube and the filler tube and into the receptacle and located in close proximity to the inner end of the filler tube, and a blade movable in the casing and located between the ejector and the flexible tube, the lower edge of the blade being sharp- 3. In a dispensing machine, a weighing scale for supporting a receptacle, a fillertube for receiving the upper end of the receptacle, a machine casing having an orifice, a flexible tube interconnecting the orifice with the filler tube for conducting material from the casingto the filler tube, an ejector for forcing material from the casing through the flexible tube and the filler tube and into edge located substantially ingthrou through the orifice and the tube,

- across the orifice,

the rece tacle and located in close proximity to the exible tube, and a blade having a sharpened edge movable in the casing and located between the ejector and the flexible tube for closing the orifice, the lower sharp at the lower side of the orifice when the orifice is closed by the blade.

' 4. In a dispensing machine, scale for supporting a receptacle, for receiving the up er end of the receptacle, a machine casing, a exible tube interconnecting a filler tube and the casingfor conducting material from the casing to the filler tube, an ejector for forcing material from the eash the flexible tube and the filler tube and into the receptacle and located in close proximity to the flexible tube, and a blade movable in the casing and located between the ejector and the flexible tube, the lower edge of the blade being beveled on the side that the ejector is located on.

5. In a dispensing machine, a filler tube,

a frame, a scale for supporting the frame, the filler tube connected to the rame, a machine casing, an ejector located in the casing, a flexible tube for connecting the filler tube a weighing with the casing, a shutter blade located in the casing, a lever for operating the shutter blade, a second lever, means located on the frame for tripping the second lever to disengage the first lever to cause the first lever to close the shutter blade, a member pivoted on the. first named lever, stops for limiting the movements of the said member to position the said member between the first and second levers when the shutter is closed and for raising the second lever when the first lever is raised and to disconnect the levers when the first lever has been engaged by the second lever.

,for directing the material dispensed into a receptacle and extending substantially horizontally, a machine casing having an orifice communicating with the tube, an 818Ct01 located in the casing for forcing the material a counterbalanced movable frame for sup rting the receptacle and the filler tube, a exible tube interconnecting and a cut-off blade movable in the casing and the lower end of the cutoif blade extending .to near the lower end of the orifice when the orifice is closed by the blade.

7. In a dispensing machine, a filler tube for directing the material dispensed into a receptacle, a machine casing having anonfice communicating with the tube, an ejector located in the casing for forcing mater al through the orifice and the tube, a frame for supporting the receptacle and the filler tube, a scale for supporting .the frame in position to hold the filler tube in receiving a filler tube the casing and the filler tube III male

relation to said orifice, and a time an, movable in the casing, the lowerend of the cut-01f blade extending to near the lower end 3; i310 orifice when the orifice is closed'by the a e. Y

r 8. In a dispensing machine, a filling tube for directing the material dispensed into a i a receptacle and extending substantially hori-.

zontally, a machine casing having an orifice communicating with the tube, an ejector located in the casin for forcing the material through the ori cc and the tube, a countel-balanced movable frame for supporting. 'the receptacle and the filler tube in position to hold the filler tube in receiving relation to said orifice and, a cut-off blade movable in.

the casing and-across the orifice, the lower end of the cut-off blade extendin is closed by the blade. v 9.;In a dispensing machine, a casing having a dischar e or1fice, a passage leading from the inter or .of the casing to the On- -fice, ajslot throu h the wall of the casing into one side. of t e passage and a notch in the other side of the pamage, a propeller in the casing adapted to discharge powdery or granular material through the passage and orifice, and a gate slidable through-the slot and having an end ada ted to'enter the notch and bear against the si e of the notch towards the orifice. 1 g

- 10. In adispensin machine, a casing having a discha '011 ce, a passage ,leading' from the interior of the casing to the ori-.

fice, aslot through the wall of the casing into.

one side of the passage and a notch in the. other side of the passage, the side of the pas sage in-which the notch is made bein rounded, a. propeller in the casin 'adap to discharge material through t e slot and into the end oflthe v ened and a 'towards the middle thereof.

11..'Ina dispen ing a discharge 3 to side of the a side of I the passa "'when the gate is I In a device, a casing havte bein sharpin sliding relation with one side of the: notch and being shaped so [that it shears against one wall of thenotch first-near the corners of'the gate then device, a casing havori ee, a p leading from the interior of the casing-to the orifice,-

a slot throughithe wall of the easing into one side ofthe passage and-a notch inthe other and agate slidable through the slot jan having an end adapted to enter the notch, the end of the gate bein sharpened and onl partially filling the note osed.'

ing a" disch 'o ce, a passageleading jfrpm the interior of thecasing to the orifice, a slojt throughthe wall of the easing into one sidejofi-thep go and anotch in the-other avinganend'ada ted{,: otch, one M of theendgo the 1 llll I v to near the lower end of the orifice when t e orifice a discharge orifice, a fpassa notch, one face of the end of the of the notch and the other face of the end of the gate being beveled. f v 1 13. Ina dispensing device,,a casing having 'adischarge orifice, a passage leading from the'interior of the casing. to the orifice, a slot gate being adapted to slian iina' one wall through the wallofthe casing into one side of the passage and a notch in theother side (passage, a gate slidablethrough. the v of the slot an notch, means. to move the notch, and'a sto moving means with the end of the gate 10- having an end adapted to enter the outed substantially at the lower side of the orifice and before it has entered: to the full depth of the notch."

14. In a dispensin device, a'casingand' a discharge member aving a lead-' ing from the casing, there through the wall at one side of sai passage gate towards the p in position to stop said 7 and a notch in the wall at the other sid'eof the and aving a s arpene endadaptedgto =enter said notch and a sto adaptedto stop the movement of the gate efore the sharpened end thereof has the notch.- I

- 15. Ina dispensing device, a casing having leading from the interior. of the'casing-to t e orifice, a slot through the wall of the easing into one side assage, a= ate reci rocable in said slot entered to the fulldepth of of the passageand a notch in the other side a slot through the wall of the easing into one side-of the-passage and a notch in the other side of the usage and a gate slidable through the 0t and h avinganend adapted to enter the notch, the slot and notch being 7 arranged for diagonal movement of the gate across the assa'ge.

17. Ina 'spensing a discharge orifice, a passage leading from device, a casing having the interior of the casing to the orifice, a slot through the wall of the casingl'into one side of the passage and a notch in t e other side of the passage, and a gate slidable. through the slot and having an end adapted toenter the 'notch, and packingin the slot around the testimony whereoffI have hereunto signed my name to this sfiecification. 

